The 195 nations that signed the Paris climate deal have pledged to keep the average global temperature from rising 2 degrees Celsius above pre-industrial levels. Here's one way to visualize how close we're already getting to those limits.

The 195 nations that signed the Paris climate deal have pledged to keep the average global temperature from rising 2 degrees Celsius above pre-industrial levels. Here's one way to visualize how close we're already getting to those limits.